# Stage 1: Build frontend
FROM node:20-alpine AS frontend-builder

WORKDIR /app/frontend

# Copy package files
COPY frontend/package.json frontend/package-lock.json* ./

# Install dependencies
RUN npm install

# Copy frontend source
COPY frontend/ ./

# Build frontend
RUN npm run build

# Stage 2: Production image
FROM python:3.12-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app/backend

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Copy backend requirements and install
COPY backend/requirements.txt ./backend/
RUN pip install --no-cache-dir -r backend/requirements.txt

# Copy backend source
COPY backend/ ./backend/

# Copy built frontend from first stage
COPY --from=frontend-builder /app/frontend/dist ./frontend/dist

# Create non-root user
RUN useradd -m -u 1000 appuser && \
    chown -R appuser:appuser /app
USER appuser

# Expose port
EXPOSE 5000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:5000/api/health || exit 1

# Start the application
WORKDIR /app/backend
CMD ["python", "app.py"]